I wish to line an external wall which is a solid wall.
My thoughts are:.
Batten wall, apply thermoline plasterboard. Will the space between battens need to be filled with extrra insulation and where shoud vapour barrier be placed. Between plasterboard and battens?
Secondly I thought of again battening the wall placing polystyreen between battens, applying vapour barrier and then use standard plasterboard.
As this is a solid wall what should I do regarding ventilation.